site stats

Makefile define ifeq

WebGo to the previous, next section.. Functions for Transforming Text. Functions allow you to do text processing in the makefile to compute the files to operate on or the commands to use. You use a function in a function call, where you give the name of the function and some text (the arguments) for the function to operate on.The result of the function's processing … WebMakefile check if variable is defined. GitHub Gist: instantly share code, notes, and snippets.

Makefile学习笔记_Y.Z.T的博客-CSDN博客

WebOct 20, 2024 · Makefile:1: *** empty variable name. Stop. Could anyone please help me find what's wrong with my code! linux; make; Share. Improve this question. Follow asked Oct 20, 2024 at 9:50. ... which will cause that line to a) define something as a function-like macro which will expand to its second argument when used as $(call something, ... Webdefine variable endef. Define a multi-line, recursively-expanded variable. See section Defining Canned Command Sequences. ifdef variable ifndef variable ifeq (a,b) ifeq "a" "b" ifeq 'a' 'b' ifneq (a,b) ifneq "a" "b" ifneq 'a' 'b' else endif. Conditionally evaluate part of the makefile. See section Conditional Parts of Makefiles. include file ... startseite ottogroup.com https://pisciotto.net

GNU Make - Quick Reference - Massachusetts Institute of Technology

WebAug 23, 2015 · As the conditional-directive ifeq is frequently used to compare word (s) expanded from variables, which often contains white-space, we may want and, in … WebBut, only do this if the source and object makefiles differ #----- ifndef PROJ_MAKEFILE PROJ_MAKEFILE := $(PROJ_SRC_DIR)/Makefile endif ifneq ($(PROJ_OBJ_DIR),$(PROJ_SRC_DIR)) Makefile: $(PROJ_MAKEFILE) $(ExtraMakefiles) $(Echo) "Updating Makefile" $(Verb) $(MKDIR) $(@D) $(Verb) $(CP) -f $< $@ # Copy … Webdefine variable endef. Define a multi-line, recursively-expanded variable. See section Defining Canned Command Sequences. ifdef variable ifndef variable ifeq (a,b) ifeq "a" … startseite wifionice

Conditional Syntax (GNU make)

Category:shell script - makefile syntax error for if-else construct - Unix ...

Tags:Makefile define ifeq

Makefile define ifeq

Conditional Functions (GNU make)

WebApr 12, 2024 · 0️⃣ 前言. Make是常用的构建工具, 一般是编译一个工程时使用的工具 。. 用来描述哪些文件需要编译、哪些需要重新编译的文件就叫做 Makefile，Makefile 带来的好处就是可以实现工程的全自动编译. make是 一个命令工具，一个解释 makefile 中指令的命令工具. 从程序源码到可执行文件 （如.out文件） 的 ... WebThese are Makefile directives, not shell directives, so they shouldn’t be tab-prefixed: CHK = 0 default: ifeq ($(CHK), 0) echo "ok" else echo "not ok" endif Otherwise Make passes them to the shell, rather than handling them itself.

Makefile define ifeq

Did you know?

WebJun 19, 2024 · 基本的なルール. Makefileはターゲット (target)、必須項目 (prereq)、コマンド (comands)から成り、. 必須項目のファイルがターゲットよりも新しい場合にコマンドが実行されます。. ちなみにインデントはTABでないと駄目です。. target: prereq1 prereq2 commands. ↓Makefileの ... WebYou can specify a value in the makefile, either with an assignment (see section Setting Variables) or with a verbatim definition (see section Defining Variables Verbatim). Variables in the environment become make variables. See section Variables from the Environment. Several automatic variables are given new values for each rule. Each of these ...

WebMar 23, 2009 · $(shell) is a special function in gmake that runs an external command and captures the output for use in the makefile. For example, you could get the current working directory like this: CWD=$(shell pwd) all: @echo This makefile lives in $(CWD). It is the interaction between recursive variables and $(shell) that causes the performance problem. WebOct 21, 2024 · Makefileでターゲット内で設定した変数を用いた条件分岐が意図した動作にならない. その変数を用いて条件分岐により処理を切り替えたいと考えています．. 以下のようなMakefileを書きました．. build: $ (eval CC := gcc) ifeq ($ (CC),gcc) @echo $ (CC) is gcc else @echo $ (CC) is ...

Webifeq (0,${MAKELEVEL}) cur-dir := $(shell pwd) whoami := $(shell whoami) host-type := $(shell arch) MAKE := ${MAKE} host-type=${host-type} whoami=${whoami} endif An … WebJan 17, 2013 · # To avoid any implicit rule to kick in, define an empty command. scripts/basic/ %: scripts_basic ; PHONY += outputmakefile # outputmakefile generates a Makefile in the output directory, if using a # separate output directory. This allows convenient use of make in the # output directory. outputmakefile: ifneq …

WebJan 18, 2016 · Makefileにおける条件文. foo の値に応じて異なる処理する場合、条件文が使えます。. # Makefile抜粋 ifdef foo FN=$ {foo} else FN=default endif. make foo=bar の場合、 FN が bar となって、 make のみなら、 FN が default になります。. ifdef 以外にも、 ifndef 、 ifeq など多数あります ...

Web之前一直纠结makefile中“=”和“:=”的区别到底有什么区别，因为给变量赋值时，两个符号都在使用。 网上搜了一下，有人给出了解答，但是本人愚钝，看不懂什么意思。 startseite echosign.comWebThe ifeq directive begins the conditional, and specifies the condition. It contains two arguments, separated by a comma and surrounded by parentheses. Variable substitution … startseite windows explorer festlegenWebFeb 7, 2012 · ifeq and its friends ifneq, ifdef, ifndef, ifperl, ifmakeperl, ... This statement provides a way to define a Perl subroutine inside your makefile. The first variant is plain Perl code, while the second variant first passes the statement through Make-style variable expansion. The syntax is identical to that of the Perl sub statement, except that ... startseite edge festlegen windows 10WebA simple and easy-to-use library to enjoy videogames programming - raylib/Makefile at master · raysan5/raylib startseite bshg.comWebJun 4, 2024 · The trick with makefile syntax is that when a line after a target begins with a tab character, this lines is not a make statement anymore, but rather is passed (after $ variables and functions are evaluated) to the shell, as a command that is supposed to build the target. ifeq is not a valid command for the shell. startseite mediathek zdf livehttp://duoduokou.com/cplusplus/33766850768751471208.html pet friendly vacation rentals steinhatchee flWebThe ifeq directive begins the conditional, and specifies the condition. It contains two arguments, separated by a comma and surrounded by parentheses. Variable … pet friendly vacation rentals north shore mn